includes/Article.php

   1 <?php
   2 /**
   3  * User interface for page actions.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Class for viewing MediaWiki article and history.
  25  *
  26  * This maintains WikiPage functions for backwards compatibility.
  27  *
  28  * @todo move and rewrite code to an Action class
  29  *
  30  * See design.txt for an overview.
  31  * Note: edit user interface and cache support functions have been
  32  * moved to separate EditPage and HTMLFileCache classes.
  33  *
  34  * @internal documentation reviewed 15 Mar 2010
  35  */
  36 class Article extends Page {
  37         /**@{{
  38          * @private
  39          */
  40
  41         /**
  42          * The context this Article is executed in
  43          * @var IContextSource $mContext
  44          */
  45         protected $mContext;
  46
  47         /**
  48          * The WikiPage object of this instance
  49          * @var WikiPage $mPage
  50          */
  51         protected $mPage;
  52
  53         /**
  54          * ParserOptions object for $wgUser articles
  55          * @var ParserOptions $mParserOptions
  56          */
  57         public $mParserOptions;
  58
  59         /**
  60          * Content of the revision we are working on
  61          * @var string $mContent
  62          */
  63         var $mContent;                    // !<
  64
  65         /**
  66          * Is the content ($mContent) already loaded?
  67          * @var bool $mContentLoaded
  68          */
  69         var $mContentLoaded = false;      // !<
  70
  71         /**
  72          * The oldid of the article that is to be shown, 0 for the
  73          * current revision
  74          * @var int|null $mOldId
  75          */
  76         var $mOldId;                      // !<
  77
  78         /**
  79          * Title from which we were redirected here
  80          * @var Title $mRedirectedFrom
  81          */
  82         var $mRedirectedFrom = null;
  83
  84         /**
  85          * URL to redirect to or false if none
  86          * @var string|false $mRedirectUrl
  87          */
  88         var $mRedirectUrl = false;        // !<
  89
  90         /**
  91          * Revision ID of revision we are working on
  92          * @var int $mRevIdFetched
  93          */
  94         var $mRevIdFetched = 0;           // !<
  95
  96         /**
  97          * Revision we are working on
  98          * @var Revision $mRevision
  99          */
 100         var $mRevision = null;
 101
 102         /**
 103          * ParserOutput object
 104          * @var ParserOutput $mParserOutput
 105          */
 106         var $mParserOutput;
 107
 108         /**@}}*/
 109
 110         /**
 111          * Constructor and clear the article
 112          * @param $title Title Reference to a Title object.
 113          * @param $oldId Integer revision ID, null to fetch from request, zero for current
 114          */
 115         public function __construct( Title $title, $oldId = null ) {
 116                 $this->mOldId = $oldId;
 117                 $this->mPage = $this->newPage( $title );
 118         }
 119
 120         /**
 121          * @param $title Title
 122          * @return WikiPage
 123          */
 124         protected function newPage( Title $title ) {
 125                 return new WikiPage( $title );
 126         }
 127
 128         /**
 129          * Constructor from a page id
 130          * @param $id Int article ID to load
 131          * @return Article|null
 132          */
 133         public static function newFromID( $id ) {
 134                 $t = Title::newFromID( $id );
 135                 # @todo FIXME: Doesn't inherit right
 136                 return $t == null ? null : new self( $t );
 137                 # return $t == null ? null : new static( $t ); // PHP 5.3
 138         }
 139
 140         /**
 141          * Create an Article object of the appropriate class for the given page.
 142          *
 143          * @param $title Title
 144          * @param $context IContextSource
 145          * @return Article object
 146          */
 147         public static function newFromTitle( $title, IContextSource $context ) {
 148                 if ( NS_MEDIA == $title->getNamespace() ) {
 149                         // FIXME: where should this go?
 150                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 151                 }
 152
 153                 $page = null;
 154                 wfRunHooks( 'ArticleFromTitle', array( &$title, &$page ) );
 155                 if ( !$page ) {
 156                         switch( $title->getNamespace() ) {
 157                                 case NS_FILE:
 158                                         $page = new ImagePage( $title );
 159                                         break;
 160                                 case NS_CATEGORY:
 161                                         $page = new CategoryPage( $title );
 162                                         break;
 163                                 default:
 164                                         $page = new Article( $title );
 165                         }
 166                 }
 167                 $page->setContext( $context );
 168
 169                 return $page;
 170         }
 171
 172         /**
 173          * Create an Article object of the appropriate class for the given page.
 174          *
 175          * @param $page WikiPage
 176          * @param $context IContextSource
 177          * @return Article object
 178          */
 179         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 180                 $article = self::newFromTitle( $page->getTitle(), $context );
 181                 $article->mPage = $page; // override to keep process cached vars
 182                 return $article;
 183         }
 184
 185         /**
 186          * Tell the page view functions that this view was redirected
 187          * from another page on the wiki.
 188          * @param $from Title object.
 189          */
 190         public function setRedirectedFrom( Title $from ) {
 191                 $this->mRedirectedFrom = $from;
 192         }
 193
 194         /**
 195          * Get the title object of the article
 196          *
 197          * @return Title object of this page
 198          */
 199         public function getTitle() {
 200                 return $this->mPage->getTitle();
 201         }
 202
 203         /**
 204          * Get the WikiPage object of this instance
 205          *
 206          * @since 1.19
 207          * @return WikiPage
 208          */
 209         public function getPage() {
 210                 return $this->mPage;
 211         }
 212
 213         /**
 214          * Clear the object
 215          */
 216         public function clear() {
 217                 $this->mContentLoaded = false;
 218
 219                 $this->mRedirectedFrom = null; # Title object if set
 220                 $this->mRevIdFetched = 0;
 221                 $this->mRedirectUrl = false;
 222
 223                 $this->mPage->clear();
 224         }
 225
 226         /**
 227          * Note that getContent/loadContent do not follow redirects anymore.
 228          * If you need to fetch redirectable content easily, try
 229          * the shortcut in WikiPage::getRedirectTarget()
 230          *
 231          * This function has side effects! Do not use this function if you
 232          * only want the real revision text if any.
 233          *
 234          * @return string Return the text of this revision
 235          */
 236         public function getContent() {
 237                 wfProfileIn( __METHOD__ );
 238
 239                 if ( $this->mPage->getID() === 0 ) {
 240                         # If this is a MediaWiki:x message, then load the messages
 241                         # and return the message value for x.
 242                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 243                                 $text = $this->getTitle()->getDefaultMessageText();
 244                                 if ( $text === false ) {
 245                                         $text = '';
 246                                 }
 247                         } else {
 248                                 $text = wfMsgExt( $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', 'parsemag' );
 249                         }
 250                         wfProfileOut( __METHOD__ );
 251
 252                         return $text;
 253                 } else {
 254                         $this->fetchContent();
 255                         wfProfileOut( __METHOD__ );
 256
 257                         return $this->mContent;
 258                 }
 259         }
 260
 261         /**
 262          * @return int The oldid of the article that is to be shown, 0 for the
 263          *             current revision
 264          */
 265         public function getOldID() {
 266                 if ( is_null( $this->mOldId ) ) {
 267                         $this->mOldId = $this->getOldIDFromRequest();
 268                 }
 269
 270                 return $this->mOldId;
 271         }
 272
 273         /**
 274          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 275          *
 276          * @return int The old id for the request
 277          */
 278         public function getOldIDFromRequest() {
 279                 $this->mRedirectUrl = false;
 280
 281                 $request = $this->getContext()->getRequest();
 282                 $oldid = $request->getIntOrNull( 'oldid' );
 283
 284                 if ( $oldid === null ) {
 285                         return 0;
 286                 }
 287
 288                 if ( $oldid !== 0 ) {
 289                         # Load the given revision and check whether the page is another one.
 290                         # In that case, update this instance to reflect the change.
 291                         if ( $oldid === $this->mPage->getLatest() ) {
 292                                 $this->mRevision = $this->mPage->getRevision();
 293                         } else {
 294                                 $this->mRevision = Revision::newFromId( $oldid );
 295                                 if ( $this->mRevision !== null ) {
 296                                         // Revision title doesn't match the page title given?
 297                                         if ( $this->mPage->getID() != $this->mRevision->getPage() ) {
 298                                                 $function = array( get_class( $this->mPage ), 'newFromID' );
 299                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 300                                         }
 301                                 }
 302                         }
 303                 }
 304
 305                 if ( $request->getVal( 'direction' ) == 'next' ) {
 306                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 307                         if ( $nextid ) {
 308                                 $oldid = $nextid;
 309                                 $this->mRevision = null;
 310                         } else {
 311                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 312                         }
 313                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 314                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 315                         if ( $previd ) {
 316                                 $oldid = $previd;
 317                                 $this->mRevision = null;
 318                         }
 319                 }
 320
 321                 return $oldid;
 322         }
 323
 324         /**
 325          * Load the revision (including text) into this object
 326          *
 327          * @deprecated in 1.19; use fetchContent()
 328          */
 329         function loadContent() {
 330                 wfDeprecated( __METHOD__, '1.19' );
 331                 $this->fetchContent();
 332         }
 333
 334         /**
 335          * Get text of an article from database
 336          * Does *NOT* follow redirects.
 337          *
 338          * @return mixed string containing article contents, or false if null
 339          */
 340         function fetchContent() {
 341                 if ( $this->mContentLoaded ) {
 342                         return $this->mContent;
 343                 }
 344
 345                 wfProfileIn( __METHOD__ );
 346
 347                 $this->mContentLoaded = true;
 348
 349                 $oldid = $this->getOldID();
 350
 351                 # Pre-fill content with error message so that if something
 352                 # fails we'll have something telling us what we intended.
 353                 $this->mContent = wfMsgNoTrans( 'missing-revision', $oldid );
 354
 355                 if ( $oldid ) {
 356                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 357                         if ( !$this->mRevision ) {
 358                                 $this->mRevision = Revision::newFromId( $oldid );
 359                                 if ( !$this->mRevision ) {
 360                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 361                                         wfProfileOut( __METHOD__ );
 362                                         return false;
 363                                 }
 364                         }
 365                 } else {
 366                         if ( !$this->mPage->getLatest() ) {
 367                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 368                                 wfProfileOut( __METHOD__ );
 369                                 return false;
 370                         }
 371
 372                         $this->mRevision = $this->mPage->getRevision();
 373                         if ( !$this->mRevision ) {
 374                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 375                                 wfProfileOut( __METHOD__ );
 376                                 return false;
 377                         }
 378                 }
 379
 380                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 381                 // We should instead work with the Revision object when we need it...
 382                 $this->mContent = $this->mRevision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 383                 $this->mRevIdFetched = $this->mRevision->getId();
 384
 385                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) );
 386
 387                 wfProfileOut( __METHOD__ );
 388
 389                 return $this->mContent;
 390         }
 391
 392         /**
 393          * No-op
 394          * @deprecated since 1.18
 395          */
 396         public function forUpdate() {
 397                 wfDeprecated( __METHOD__, '1.18' );
 398         }
 399
 400         /**
 401          * Returns true if the currently-referenced revision is the current edit
 402          * to this page (and it exists).
 403          * @return bool
 404          */
 405         public function isCurrent() {
 406                 # If no oldid, this is the current version.
 407                 if ( $this->getOldID() == 0 ) {
 408                         return true;
 409                 }
 410
 411                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 412         }
 413
 414         /**
 415          * Get the fetched Revision object depending on request parameters or null
 416          * on failure.
 417          *
 418          * @since 1.19
 419          * @return Revision|null
 420          */
 421         public function getRevisionFetched() {
 422                 $this->fetchContent();
 423
 424                 return $this->mRevision;
 425         }
 426
 427         /**
 428          * Use this to fetch the rev ID used on page views
 429          *
 430          * @return int revision ID of last article revision
 431          */
 432         public function getRevIdFetched() {
 433                 if ( $this->mRevIdFetched ) {
 434                         return $this->mRevIdFetched;
 435                 } else {
 436                         return $this->mPage->getLatest();
 437                 }
 438         }
 439
 440         /**
 441          * This is the default action of the index.php entry point: just view the
 442          * page of the given title.
 443          */
 444         public function view() {
 445                 global $wgParser, $wgUseFileCache, $wgUseETag, $wgDebugToolbar;
 446
 447                 wfProfileIn( __METHOD__ );
 448
 449                 # Get variables from query string
 450                 # As side effect this will load the revision and update the title
 451                 # in a revision ID is passed in the request, so this should remain
 452                 # the first call of this method even if $oldid is used way below.
 453                 $oldid = $this->getOldID();
 454
 455                 $user = $this->getContext()->getUser();
 456                 # Another whitelist check in case getOldID() is altering the title
 457                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 458                 if ( count( $permErrors ) ) {
 459                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 460                         wfProfileOut( __METHOD__ );
 461                         throw new PermissionsError( 'read', $permErrors );
 462                 }
 463
 464                 $outputPage = $this->getContext()->getOutput();
 465                 # getOldID() may as well want us to redirect somewhere else
 466                 if ( $this->mRedirectUrl ) {
 467                         $outputPage->redirect( $this->mRedirectUrl );
 468                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 469                         wfProfileOut( __METHOD__ );
 470
 471                         return;
 472                 }
 473
 474                 # If we got diff in the query, we want to see a diff page instead of the article.
 475                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 476                         wfDebug( __METHOD__ . ": showing diff page\n" );
 477                         $this->showDiffPage();
 478                         wfProfileOut( __METHOD__ );
 479
 480                         return;
 481                 }
 482
 483                 # Set page title (may be overridden by DISPLAYTITLE)
 484                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 485
 486                 $outputPage->setArticleFlag( true );
 487                 # Allow frames by default
 488                 $outputPage->allowClickjacking();
 489
 490                 $parserCache = ParserCache::singleton();
 491
 492                 $parserOptions = $this->getParserOptions();
 493                 # Render printable version, use printable version cache
 494                 if ( $outputPage->isPrintable() ) {
 495                         $parserOptions->setIsPrintable( true );
 496                         $parserOptions->setEditSection( false );
 497                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user ) ) {
 498                         $parserOptions->setEditSection( false );
 499                 }
 500
 501                 # Try client and file cache
 502                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 503                         if ( $wgUseETag ) {
 504                                 $outputPage->setETag( $parserCache->getETag( $this, $parserOptions ) );
 505                         }
 506
 507                         # Is it client cached?
 508                         if ( $outputPage->checkLastModified( $this->mPage->getTouched() ) ) {
 509                                 wfDebug( __METHOD__ . ": done 304\n" );
 510                                 wfProfileOut( __METHOD__ );
 511
 512                                 return;
 513                         # Try file cache
 514                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 515                                 wfDebug( __METHOD__ . ": done file cache\n" );
 516                                 # tell wgOut that output is taken care of
 517                                 $outputPage->disable();
 518                                 $this->mPage->doViewUpdates( $user );
 519                                 wfProfileOut( __METHOD__ );
 520
 521                                 return;
 522                         }
 523                 }
 524
 525                 # Should the parser cache be used?
 526                 $useParserCache = $this->mPage->isParserCacheUsed( $parserOptions, $oldid );
 527                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 528                 if ( $user->getStubThreshold() ) {
 529                         wfIncrStats( 'pcache_miss_stub' );
 530                 }
 531
 532                 $this->showRedirectedFromHeader();
 533                 $this->showNamespaceHeader();
 534
 535                 # Iterate through the possible ways of constructing the output text.
 536                 # Keep going until $outputDone is set, or we run out of things to do.
 537                 $pass = 0;
 538                 $outputDone = false;
 539                 $this->mParserOutput = false;
 540
 541                 while ( !$outputDone && ++$pass ) {
 542                         switch( $pass ) {
 543                                 case 1:
 544                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 545                                         break;
 546                                 case 2:
 547                                         # Early abort if the page doesn't exist
 548                                         if ( !$this->mPage->exists() ) {
 549                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 550                                                 $this->showMissingArticle();
 551                                                 wfProfileOut( __METHOD__ );
 552                                                 return;
 553                                         }
 554
 555                                         # Try the parser cache
 556                                         if ( $useParserCache ) {
 557                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 558
 559                                                 if ( $this->mParserOutput !== false ) {
 560                                                         if ( $oldid ) {
 561                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 562                                                                 $this->setOldSubtitle( $oldid );
 563                                                         } else {
 564                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 565                                                         }
 566                                                         $outputPage->addParserOutput( $this->mParserOutput );
 567                                                         # Ensure that UI elements requiring revision ID have
 568                                                         # the correct version information.
 569                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 570                                                         # Preload timestamp to avoid a DB hit
 571                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 572                                                         if ( $cachedTimestamp !== null ) {
 573                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 574                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 575                                                         }
 576                                                         $outputDone = true;
 577                                                 }
 578                                         }
 579                                         break;
 580                                 case 3:
 581                                         # This will set $this->mRevision if needed
 582                                         $this->fetchContent();
 583
 584                                         # Are we looking at an old revision
 585                                         if ( $oldid && $this->mRevision ) {
 586                                                 $this->setOldSubtitle( $oldid );
 587
 588                                                 if ( !$this->showDeletedRevisionHeader() ) {
 589                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 590                                                         wfProfileOut( __METHOD__ );
 591                                                         return;
 592                                                 }
 593                                         }
 594
 595                                         # Ensure that UI elements requiring revision ID have
 596                                         # the correct version information.
 597                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 598                                         # Preload timestamp to avoid a DB hit
 599                                         $outputPage->setRevisionTimestamp( $this->getTimestamp() );
 600
 601                                         # Pages containing custom CSS or JavaScript get special treatment
 602                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 603                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 604                                                 $this->showCssOrJsPage();
 605                                                 $outputDone = true;
 606                                         } elseif( !wfRunHooks( 'ArticleViewCustom', array( $this->mContent, $this->getTitle(), $outputPage ) ) ) {
 607                                                 # Allow extensions do their own custom view for certain pages
 608                                                 $outputDone = true;
 609                                         } else {
 610                                                 $text = $this->getContent();
 611                                                 $rt = Title::newFromRedirectArray( $text );
 612                                                 if ( $rt ) {
 613                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 614                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 615                                                         $outputPage->addHTML( $this->viewRedirect( $rt ) );
 616                                                         # Parse just to get categories, displaytitle, etc.
 617                                                         $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(), $parserOptions );
 618                                                         $outputPage->addParserOutputNoText( $this->mParserOutput );
 619                                                         $outputDone = true;
 620                                                 }
 621                                         }
 622                                         break;
 623                                 case 4:
 624                                         # Run the parse, protected by a pool counter
 625                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 626
 627                                         $poolArticleView = new PoolWorkArticleView( $this, $parserOptions,
 628                                                 $this->getRevIdFetched(), $useParserCache, $this->getContent() );
 629
 630                                         if ( !$poolArticleView->execute() ) {
 631                                                 $error = $poolArticleView->getError();
 632                                                 if ( $error ) {
 633                                                         $outputPage->clearHTML(); // for release() errors
 634                                                         $outputPage->enableClientCache( false );
 635                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 636
 637                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 638                                                         $outputPage->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 639                                                 }
 640                                                 # Connection or timeout error
 641                                                 wfProfileOut( __METHOD__ );
 642                                                 return;
 643                                         }
 644
 645                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 646                                         $outputPage->addParserOutput( $this->mParserOutput );
 647
 648                                         # Don't cache a dirty ParserOutput object
 649                                         if ( $poolArticleView->getIsDirty() ) {
 650                                                 $outputPage->setSquidMaxage( 0 );
 651                                                 $outputPage->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
 652                                         }
 653
 654                                         $outputDone = true;
 655                                         break;
 656                                 # Should be unreachable, but just in case...
 657                                 default:
 658                                         break 2;
 659                         }
 660                 }
 661
 662                 # Get the ParserOutput actually *displayed* here.
 663                 # Note that $this->mParserOutput is the *current* version output.
 664                 $pOutput = ( $outputDone instanceof ParserOutput )
 665                         ? $outputDone // object fetched by hook
 666                         : $this->mParserOutput;
 667
 668                 # Adjust title for main page & pages with displaytitle
 669                 if ( $pOutput ) {
 670                         $this->adjustDisplayTitle( $pOutput );
 671                 }
 672
 673                 # For the main page, overwrite the <title> element with the con-
 674                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 675                 # that's not empty).
 676                 # This message always exists because it is in the i18n files
 677                 if ( $this->getTitle()->isMainPage() ) {
 678                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 679                         if ( !$msg->isDisabled() ) {
 680                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 681                         }
 682                 }
 683
 684                 # Check for any __NOINDEX__ tags on the page using $pOutput
 685                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 686                 $outputPage->setIndexPolicy( $policy['index'] );
 687                 $outputPage->setFollowPolicy( $policy['follow'] );
 688
 689                 $this->showViewFooter();
 690                 $this->mPage->doViewUpdates( $user );
 691
 692                 wfProfileOut( __METHOD__ );
 693         }
 694
 695         /**
 696          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 697          * @param $pOutput ParserOutput
 698          */
 699         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 700                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 701                 $titleText = $pOutput->getTitleText();
 702                 if ( strval( $titleText ) !== '' ) {
 703                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 704                 }
 705         }
 706
 707         /**
 708          * Show a diff page according to current request variables. For use within
 709          * Article::view() only, other callers should use the DifferenceEngine class.
 710          */
 711         public function showDiffPage() {
 712                 $request = $this->getContext()->getRequest();
 713                 $user = $this->getContext()->getUser();
 714                 $diff = $request->getVal( 'diff' );
 715                 $rcid = $request->getVal( 'rcid' );
 716                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 717                 $purge = $request->getVal( 'action' ) == 'purge';
 718                 $unhide = $request->getInt( 'unhide' ) == 1;
 719                 $oldid = $this->getOldID();
 720
 721                 $de = new DifferenceEngine( $this->getContext(), $oldid, $diff, $rcid, $purge, $unhide );
 722                 // DifferenceEngine directly fetched the revision:
 723                 $this->mRevIdFetched = $de->mNewid;
 724                 $de->showDiffPage( $diffOnly );
 725
 726                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 727                         # Run view updates for current revision only
 728                         $this->mPage->doViewUpdates( $user );
 729                 }
 730         }
 731
 732         /**
 733          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 734          * Article::view() only.
 735          *
 736          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 737          * page views.
 738          */
 739         protected function showCssOrJsPage() {
 740                 $dir = $this->getContext()->getLanguage()->getDir();
 741                 $lang = $this->getContext()->getLanguage()->getCode();
 742
 743                 $outputPage = $this->getContext()->getOutput();
 744                 $outputPage->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 745                         'clearyourcache' );
 746
 747                 // Give hooks a chance to customise the output
 748                 if ( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->getTitle(), $outputPage ) ) ) {
 749                         // Wrap the whole lot in a <pre> and don't parse
 750                         $m = array();
 751                         preg_match( '!\.(css|js)$!u', $this->getTitle()->getText(), $m );
 752                         $outputPage->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 753                         $outputPage->addHTML( htmlspecialchars( $this->mContent ) );
 754                         $outputPage->addHTML( "\n</pre>\n" );
 755                 }
 756         }
 757
 758         /**
 759          * Get the robot policy to be used for the current view
 760          * @param $action String the action= GET parameter
 761          * @param $pOutput ParserOutput
 762          * @return Array the policy that should be set
 763          * TODO: actions other than 'view'
 764          */
 765         public function getRobotPolicy( $action, $pOutput ) {
 766                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 767
 768                 $ns = $this->getTitle()->getNamespace();
 769
 770                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 771                         # Don't index user and user talk pages for blocked users (bug 11443)
 772                         if ( !$this->getTitle()->isSubpage() ) {
 773                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 774                                         return array(
 775                                                 'index'  => 'noindex',
 776                                                 'follow' => 'nofollow'
 777                                         );
 778                                 }
 779                         }
 780                 }
 781
 782                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 783                         # Non-articles (special pages etc), and old revisions
 784                         return array(
 785                                 'index'  => 'noindex',
 786                                 'follow' => 'nofollow'
 787                         );
 788                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 789                         # Discourage indexing of printable versions, but encourage following
 790                         return array(
 791                                 'index'  => 'noindex',
 792                                 'follow' => 'follow'
 793                         );
 794                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 795                         # For ?curid=x urls, disallow indexing
 796                         return array(
 797                                 'index'  => 'noindex',
 798                                 'follow' => 'follow'
 799                         );
 800                 }
 801
 802                 # Otherwise, construct the policy based on the various config variables.
 803                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 804
 805                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 806                         # Honour customised robot policies for this namespace
 807                         $policy = array_merge(
 808                                 $policy,
 809                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 810                         );
 811                 }
 812                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 813                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 814                         # a final sanity check that we have really got the parser output.
 815                         $policy = array_merge(
 816                                 $policy,
 817                                 array( 'index' => $pOutput->getIndexPolicy() )
 818                         );
 819                 }
 820
 821                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 822                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 823                         $policy = array_merge(
 824                                 $policy,
 825                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 826                         );
 827                 }
 828
 829                 return $policy;
 830         }
 831
 832         /**
 833          * Converts a String robot policy into an associative array, to allow
 834          * merging of several policies using array_merge().
 835          * @param $policy Mixed, returns empty array on null/false/'', transparent
 836          *            to already-converted arrays, converts String.
 837          * @return Array: 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 838          */
 839         public static function formatRobotPolicy( $policy ) {
 840                 if ( is_array( $policy ) ) {
 841                         return $policy;
 842                 } elseif ( !$policy ) {
 843                         return array();
 844                 }
 845
 846                 $policy = explode( ',', $policy );
 847                 $policy = array_map( 'trim', $policy );
 848
 849                 $arr = array();
 850                 foreach ( $policy as $var ) {
 851                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 852                                 $arr['index'] = $var;
 853                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 854                                 $arr['follow'] = $var;
 855                         }
 856                 }
 857
 858                 return $arr;
 859         }
 860
 861         /**
 862          * If this request is a redirect view, send "redirected from" subtitle to
 863          * the output. Returns true if the header was needed, false if this is not
 864          * a redirect view. Handles both local and remote redirects.
 865          *
 866          * @return boolean
 867          */
 868         public function showRedirectedFromHeader() {
 869                 global $wgRedirectSources;
 870                 $outputPage = $this->getContext()->getOutput();
 871
 872                 $rdfrom = $this->getContext()->getRequest()->getVal( 'rdfrom' );
 873
 874                 if ( isset( $this->mRedirectedFrom ) ) {
 875                         // This is an internally redirected page view.
 876                         // We'll need a backlink to the source page for navigation.
 877                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 878                                 $redir = Linker::linkKnown(
 879                                         $this->mRedirectedFrom,
 880                                         null,
 881                                         array(),
 882                                         array( 'redirect' => 'no' )
 883                                 );
 884
 885                                 $outputPage->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 886
 887                                 // Set the fragment if one was specified in the redirect
 888                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 889                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 890                                         $outputPage->addInlineScript( "redirectToFragment(\"$fragment\");" );
 891                                 }
 892
 893                                 // Add a <link rel="canonical"> tag
 894                                 $outputPage->addLink( array( 'rel' => 'canonical',
 895                                         'href' => $this->getTitle()->getLocalURL() )
 896                                 );
 897
 898                                 // Tell the output object that the user arrived at this article through a redirect
 899                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
 900
 901                                 return true;
 902                         }
 903                 } elseif ( $rdfrom ) {
 904                         // This is an externally redirected view, from some other wiki.
 905                         // If it was reported from a trusted site, supply a backlink.
 906                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 907                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 908                                 $outputPage->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 909
 910                                 return true;
 911                         }
 912                 }
 913
 914                 return false;
 915         }
 916
 917         /**
 918          * Show a header specific to the namespace currently being viewed, like
 919          * [[MediaWiki:Talkpagetext]]. For Article::view().
 920          */
 921         public function showNamespaceHeader() {
 922                 if ( $this->getTitle()->isTalkPage() ) {
 923                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 924                                 $this->getContext()->getOutput()->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 925                         }
 926                 }
 927         }
 928
 929         /**
 930          * Show the footer section of an ordinary page view
 931          */
 932         public function showViewFooter() {
 933                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 934                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 935                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
 936                 }
 937
 938                 # If we have been passed an &rcid= parameter, we want to give the user a
 939                 # chance to mark this new article as patrolled.
 940                 $this->showPatrolFooter();
 941
 942                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 943
 944         }
 945
 946         /**
 947          * If patrol is possible, output a patrol UI box. This is called from the
 948          * footer section of ordinary page views. If patrol is not possible or not
 949          * desired, does nothing.
 950          */
 951         public function showPatrolFooter() {
 952                 $request = $this->getContext()->getRequest();
 953                 $outputPage = $this->getContext()->getOutput();
 954                 $user = $this->getContext()->getUser();
 955                 $rcid = $request->getVal( 'rcid' );
 956
 957                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol', $user ) ) {
 958                         return;
 959                 }
 960
 961                 $token = $user->getEditToken( $rcid );
 962                 $outputPage->preventClickjacking();
 963
 964                 $outputPage->addHTML(
 965                         "<div class='patrollink'>" .
 966                                 wfMsgHtml(
 967                                         'markaspatrolledlink',
 968                                         Linker::linkKnown(
 969                                                 $this->getTitle(),
 970                                                 wfMsgHtml( 'markaspatrolledtext' ),
 971                                                 array(),
 972                                                 array(
 973                                                         'action' => 'markpatrolled',
 974                                                         'rcid' => $rcid,
 975                                                         'token' => $token,
 976                                                 )
 977                                         )
 978                                 ) .
 979                         '</div>'
 980                 );
 981         }
 982
 983         /**
 984          * Show the error text for a missing article. For articles in the MediaWiki
 985          * namespace, show the default message text. To be called from Article::view().
 986          */
 987         public function showMissingArticle() {
 988                 global $wgSend404Code;
 989                 $outputPage = $this->getContext()->getOutput();
 990
 991                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
 992                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
 993                         $parts = explode( '/', $this->getTitle()->getText() );
 994                         $rootPart = $parts[0];
 995                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
 996                         $ip = User::isIP( $rootPart );
 997
 998                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
 999                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1000                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
1001                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1002                                 LogEventsList::showLogExtract(
1003                                         $outputPage,
1004                                         'block',
1005                                         $user->getUserPage(),
1006                                         '',
1007                                         array(
1008                                                 'lim' => 1,
1009                                                 'showIfEmpty' => false,
1010                                                 'msgKey' => array(
1011                                                         'blocked-notice-logextract',
1012                                                         $user->getName() # Support GENDER in notice
1013                                                 )
1014                                         )
1015                                 );
1016                         }
1017                 }
1018
1019                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
1020
1021                 # Show delete and move logs
1022                 LogEventsList::showLogExtract( $outputPage, array( 'delete', 'move' ), $this->getTitle(), '',
1023                         array(  'lim' => 10,
1024                                 'conds' => array( "log_action != 'revision'" ),
1025                                 'showIfEmpty' => false,
1026                                 'msgKey' => array( 'moveddeleted-notice' ) )
1027                 );
1028
1029                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code ) {
1030                         // If there's no backing content, send a 404 Not Found
1031                         // for better machine handling of broken links.
1032                         $this->getContext()->getRequest()->response()->header( "HTTP/1.1 404 Not Found" );
1033                 }
1034
1035                 $hookResult = wfRunHooks( 'BeforeDisplayNoArticleText', array( $this ) );
1036
1037                 if ( ! $hookResult ) {
1038                         return;
1039                 }
1040
1041                 # Show error message
1042                 $oldid = $this->getOldID();
1043                 if ( $oldid ) {
1044                         $text = wfMsgNoTrans( 'missing-revision', $oldid );
1045                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
1046                         // Use the default message text
1047                         $text = $this->getTitle()->getDefaultMessageText();
1048                 } elseif ( $this->getTitle()->quickUserCan( 'create', $this->getContext()->getUser() )
1049                         && $this->getTitle()->quickUserCan( 'edit', $this->getContext()->getUser() )
1050                 ) {
1051                         $text = wfMsgNoTrans( 'noarticletext' );
1052                 } else {
1053                         $text = wfMsgNoTrans( 'noarticletext-nopermission' );
1054                 }
1055                 $text = "<div class='noarticletext'>\n$text\n</div>";
1056
1057                 $outputPage->addWikiText( $text );
1058         }
1059
1060         /**
1061          * If the revision requested for view is deleted, check permissions.
1062          * Send either an error message or a warning header to the output.
1063          *
1064          * @return boolean true if the view is allowed, false if not.
1065          */
1066         public function showDeletedRevisionHeader() {
1067                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1068                         // Not deleted
1069                         return true;
1070                 }
1071
1072                 $outputPage = $this->getContext()->getOutput();
1073                 $user = $this->getContext()->getUser();
1074                 // If the user is not allowed to see it...
1075                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1076                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1077                                 'rev-deleted-text-permission' );
1078
1079                         return false;
1080                 // If the user needs to confirm that they want to see it...
1081                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1082                         # Give explanation and add a link to view the revision...
1083                         $oldid = intval( $this->getOldID() );
1084                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
1085                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1086                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1087                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1088                                 array( $msg, $link ) );
1089
1090                         return false;
1091                 // We are allowed to see...
1092                 } else {
1093                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1094                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1095                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1096
1097                         return true;
1098                 }
1099         }
1100
1101         /**
1102          * Generate the navigation links when browsing through an article revisions
1103          * It shows the information as:
1104          *   Revision as of \<date\>; view current revision
1105          *   \<- Previous version | Next Version -\>
1106          *
1107          * @param $oldid int: revision ID of this article revision
1108          */
1109         public function setOldSubtitle( $oldid = 0 ) {
1110                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1111                         return;
1112                 }
1113
1114                 $unhide = $this->getContext()->getRequest()->getInt( 'unhide' ) == 1;
1115
1116                 # Cascade unhide param in links for easy deletion browsing
1117                 $extraParams = array();
1118                 if ( $unhide ) {
1119                         $extraParams['unhide'] = 1;
1120                 }
1121
1122                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1123                         $revision = $this->mRevision;
1124                 } else {
1125                         $revision = Revision::newFromId( $oldid );
1126                 }
1127
1128                 $timestamp = $revision->getTimestamp();
1129
1130                 $current = ( $oldid == $this->mPage->getLatest() );
1131                 $language = $this->getContext()->getLanguage();
1132                 $user = $this->getContext()->getUser();
1133
1134                 $td = $language->userTimeAndDate( $timestamp, $user );
1135                 $tddate = $language->userDate( $timestamp, $user );
1136                 $tdtime = $language->userTime( $timestamp, $user );
1137
1138                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1139                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1140
1141                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1142                         ? 'revision-info-current'
1143                         : 'revision-info';
1144
1145                 $outputPage = $this->getContext()->getOutput();
1146                 $outputPage->addSubtitle( "<div id=\"mw-{$infomsg}\">" . wfMessage( $infomsg,
1147                         $td )->rawParams( $userlinks )->params( $revision->getID(), $tddate,
1148                         $tdtime, $revision->getUser() )->parse() . "</div>" );
1149
1150                 $lnk = $current
1151                         ? wfMsgHtml( 'currentrevisionlink' )
1152                         : Linker::linkKnown(
1153                                 $this->getTitle(),
1154                                 wfMsgHtml( 'currentrevisionlink' ),
1155                                 array(),
1156                                 $extraParams
1157                         );
1158                 $curdiff = $current
1159                         ? wfMsgHtml( 'diff' )
1160                         : Linker::linkKnown(
1161                                 $this->getTitle(),
1162                                 wfMsgHtml( 'diff' ),
1163                                 array(),
1164                                 array(
1165                                         'diff' => 'cur',
1166                                         'oldid' => $oldid
1167                                 ) + $extraParams
1168                         );
1169                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1170                 $prevlink = $prev
1171                         ? Linker::linkKnown(
1172                                 $this->getTitle(),
1173                                 wfMsgHtml( 'previousrevision' ),
1174                                 array(),
1175                                 array(
1176                                         'direction' => 'prev',
1177                                         'oldid' => $oldid
1178                                 ) + $extraParams
1179                         )
1180                         : wfMsgHtml( 'previousrevision' );
1181                 $prevdiff = $prev
1182                         ? Linker::linkKnown(
1183                                 $this->getTitle(),
1184                                 wfMsgHtml( 'diff' ),
1185                                 array(),
1186                                 array(
1187                                         'diff' => 'prev',
1188                                         'oldid' => $oldid
1189                                 ) + $extraParams
1190                         )
1191                         : wfMsgHtml( 'diff' );
1192                 $nextlink = $current
1193                         ? wfMsgHtml( 'nextrevision' )
1194                         : Linker::linkKnown(
1195                                 $this->getTitle(),
1196                                 wfMsgHtml( 'nextrevision' ),
1197                                 array(),
1198                                 array(
1199                                         'direction' => 'next',
1200                                         'oldid' => $oldid
1201                                 ) + $extraParams
1202                         );
1203                 $nextdiff = $current
1204                         ? wfMsgHtml( 'diff' )
1205                         : Linker::linkKnown(
1206                                 $this->getTitle(),
1207                                 wfMsgHtml( 'diff' ),
1208                                 array(),
1209                                 array(
1210                                         'diff' => 'next',
1211                                         'oldid' => $oldid
1212                                 ) + $extraParams
1213                         );
1214
1215                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1216                 if ( $cdel !== '' ) {
1217                         $cdel .= ' ';
1218                 }
1219
1220                 $outputPage->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1221                         wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1222                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>" );
1223         }
1224
1225         /**
1226          * View redirect
1227          *
1228          * @param $target Title|Array of destination(s) to redirect
1229          * @param $appendSubtitle Boolean [optional]
1230          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1231          * @return string containing HMTL with redirect link
1232          */
1233         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1234                 global $wgStylePath;
1235
1236                 if ( !is_array( $target ) ) {
1237                         $target = array( $target );
1238                 }
1239
1240                 $lang = $this->getTitle()->getPageLanguage();
1241                 $imageDir = $lang->getDir();
1242
1243                 if ( $appendSubtitle ) {
1244                         $this->getContext()->getOutput()->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1245                 }
1246
1247                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1248
1249                 /**
1250                  * @var $title Title
1251                  */
1252                 $title = array_shift( $target );
1253
1254                 if ( $forceKnown ) {
1255                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1256                 } else {
1257                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1258                 }
1259
1260                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1261                 $alt = $lang->isRTL() ? '←' : '→';
1262                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1263                 foreach ( $target as $rt ) {
1264                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1265                         if ( $forceKnown ) {
1266                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1267                         } else {
1268                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1269                         }
1270                 }
1271
1272                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1273                 return '<div class="redirectMsg">' .
1274                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1275                         '<span class="redirectText">' . $link . '</span></div>';
1276         }
1277
1278         /**
1279          * Handle action=render
1280          */
1281         public function render() {
1282                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1283                 $this->view();
1284         }
1285
1286         /**
1287          * action=protect handler
1288          */
1289         public function protect() {
1290                 $form = new ProtectionForm( $this );
1291                 $form->execute();
1292         }
1293
1294         /**
1295          * action=unprotect handler (alias)
1296          */
1297         public function unprotect() {
1298                 $this->protect();
1299         }
1300
1301         /**
1302          * UI entry point for page deletion
1303          */
1304         public function delete() {
1305                 # This code desperately needs to be totally rewritten
1306
1307                 $title = $this->getTitle();
1308                 $user = $this->getContext()->getUser();
1309
1310                 # Check permissions
1311                 $permission_errors = $title->getUserPermissionsErrors( 'delete', $user );
1312                 if ( count( $permission_errors ) ) {
1313                         throw new PermissionsError( 'delete', $permission_errors );
1314                 }
1315
1316                 # Read-only check...
1317                 if ( wfReadOnly() ) {
1318                         throw new ReadOnlyError;
1319                 }
1320
1321                 # Better double-check that it hasn't been deleted yet!
1322                 $this->mPage->loadPageData( 'fromdbmaster' );
1323                 if ( !$this->mPage->exists() ) {
1324                         $outputPage = $this->getContext()->getOutput();
1325                         $outputPage->setPageTitle( wfMessage( 'cannotdelete-title', $title->getPrefixedText() ) );
1326                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1327                                         array( 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) )
1328                                 );
1329                         $outputPage->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1330                         LogEventsList::showLogExtract(
1331                                 $outputPage,
1332                                 'delete',
1333                                 $title
1334                         );
1335
1336                         return;
1337                 }
1338
1339                 $request = $this->getContext()->getRequest();
1340                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1341                 $deleteReason = $request->getText( 'wpReason' );
1342
1343                 if ( $deleteReasonList == 'other' ) {
1344                         $reason = $deleteReason;
1345                 } elseif ( $deleteReason != '' ) {
1346                         // Entry from drop down menu + additional comment
1347                         $reason = $deleteReasonList . wfMsgForContent( 'colon-separator' ) . $deleteReason;
1348                 } else {
1349                         $reason = $deleteReasonList;
1350                 }
1351
1352                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1353                         array( 'delete', $this->getTitle()->getPrefixedText() ) ) )
1354                 {
1355                         # Flag to hide all contents of the archived revisions
1356                         $suppress = $request->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1357
1358                         $this->doDelete( $reason, $suppress );
1359
1360                         if ( $user->isLoggedIn() && $request->getCheck( 'wpWatch' ) != $user->isWatched( $title ) ) {
1361                                 if ( $request->getCheck( 'wpWatch' ) ) {
1362                                         WatchAction::doWatch( $title, $user );
1363                                 } else {
1364                                         WatchAction::doUnwatch( $title, $user );
1365                                 }
1366                         }
1367
1368                         return;
1369                 }
1370
1371                 // Generate deletion reason
1372                 $hasHistory = false;
1373                 if ( !$reason ) {
1374                         $reason = $this->generateReason( $hasHistory );
1375                 }
1376
1377                 // If the page has a history, insert a warning
1378                 if ( $hasHistory ) {
1379                         $revisions = $this->mTitle->estimateRevisionCount();
1380                         // @todo FIXME: i18n issue/patchwork message
1381                         $this->getContext()->getOutput()->addHTML( '<strong class="mw-delete-warning-revisions">' .
1382                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $this->getContext()->getLanguage()->formatNum( $revisions ) ) .
1383                                 wfMsgHtml( 'word-separator' ) . Linker::linkKnown( $title,
1384                                         wfMsgHtml( 'history' ),
1385                                         array( 'rel' => 'archives' ),
1386                                         array( 'action' => 'history' ) ) .
1387                                 '</strong>'
1388                         );
1389
1390                         if ( $this->mTitle->isBigDeletion() ) {
1391                                 global $wgDeleteRevisionsLimit;
1392                                 $this->getContext()->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1393                                         array( 'delete-warning-toobig', $this->getContext()->getLanguage()->formatNum( $wgDeleteRevisionsLimit ) ) );
1394                         }
1395                 }
1396
1397                 $this->confirmDelete( $reason );
1398         }
1399
1400         /**
1401          * Output deletion confirmation dialog
1402          * @todo FIXME: Move to another file?
1403          * @param $reason String: prefilled reason
1404          */
1405         public function confirmDelete( $reason ) {
1406                 wfDebug( "Article::confirmDelete\n" );
1407
1408                 $outputPage = $this->getContext()->getOutput();
1409                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1410                 $outputPage->addBacklinkSubtitle( $this->getTitle() );
1411                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1412                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1413
1414                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $outputPage, &$reason ) );
1415
1416                 $user = $this->getContext()->getUser();
1417
1418                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1419                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1420                                         <td></td>
1421                                         <td class='mw-input'><strong>" .
1422                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1423                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1424                                         "</strong></td>
1425                                 </tr>";
1426                 } else {
1427                         $suppress = '';
1428                 }
1429                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $this->getTitle() );
1430
1431                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1432                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1433                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1434                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1435                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1436                         "<tr id=\"wpDeleteReasonListRow\">
1437                                 <td class='mw-label'>" .
1438                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1439                                 "</td>
1440                                 <td class='mw-input'>" .
1441                                         Xml::listDropDown( 'wpDeleteReasonList',
1442                                                 wfMsgForContent( 'deletereason-dropdown' ),
1443                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1444                                 "</td>
1445                         </tr>
1446                         <tr id=\"wpDeleteReasonRow\">
1447                                 <td class='mw-label'>" .
1448                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1449                                 "</td>
1450                                 <td class='mw-input'>" .
1451                                 Html::input( 'wpReason', $reason, 'text', array(
1452                                         'size' => '60',
1453                                         'maxlength' => '255',
1454                                         'tabindex' => '2',
1455                                         'id' => 'wpReason',
1456                                         'autofocus'
1457                                 ) ) .
1458                                 "</td>
1459                         </tr>";
1460
1461                 # Disallow watching if user is not logged in
1462                 if ( $user->isLoggedIn() ) {
1463                         $form .= "
1464                         <tr>
1465                                 <td></td>
1466                                 <td class='mw-input'>" .
1467                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1468                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1469                                 "</td>
1470                         </tr>";
1471                 }
1472
1473                 $form .= "
1474                         $suppress
1475                         <tr>
1476                                 <td></td>
1477                                 <td class='mw-submit'>" .
1478                                         Xml::submitButton( wfMsg( 'deletepage' ),
1479                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1480                                 "</td>
1481                         </tr>" .
1482                         Xml::closeElement( 'table' ) .
1483                         Xml::closeElement( 'fieldset' ) .
1484                         Html::hidden( 'wpEditToken', $user->getEditToken( array( 'delete', $this->getTitle()->getPrefixedText() ) ) ) .
1485                         Xml::closeElement( 'form' );
1486
1487                         if ( $user->isAllowed( 'editinterface' ) ) {
1488                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1489                                 $link = Linker::link(
1490                                         $title,
1491                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1492                                         array(),
1493                                         array( 'action' => 'edit' )
1494                                 );
1495                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1496                         }
1497
1498                 $outputPage->addHTML( $form );
1499                 $outputPage->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1500                 LogEventsList::showLogExtract( $outputPage, 'delete',
1501                         $this->getTitle()
1502                 );
1503         }
1504
1505         /**
1506          * Perform a deletion and output success or failure messages
1507          * @param $reason
1508          * @param $suppress bool
1509          */
1510         public function doDelete( $reason, $suppress = false ) {
1511                 $error = '';
1512                 $outputPage = $this->getContext()->getOutput();
1513                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error );
1514                 if ( $status->isGood() ) {
1515                         $deleted = $this->getTitle()->getPrefixedText();
1516
1517                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1518                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1519
1520                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1521
1522                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1523                         $outputPage->returnToMain( false );
1524                 } else {
1525                         $outputPage->setPageTitle( wfMessage( 'cannotdelete-title', $this->getTitle()->getPrefixedText() ) );
1526                         if ( $error == '' ) {
1527                                 $errors = $status->getErrorsArray();
1528                                 $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1529                                         $errors[0]
1530                                 );
1531                                 $outputPage->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1532
1533                                 LogEventsList::showLogExtract(
1534                                         $outputPage,
1535                                         'delete',
1536                                         $this->getTitle()
1537                                 );
1538                         } else {
1539                                 $outputPage->addHTML( $error );
1540                         }
1541                 }
1542         }
1543
1544         /* Caching functions */
1545
1546         /**
1547          * checkLastModified returns true if it has taken care of all
1548          * output to the client that is necessary for this request.
1549          * (that is, it has sent a cached version of the page)
1550          *
1551          * @return boolean true if cached version send, false otherwise
1552          */
1553         protected function tryFileCache() {
1554                 static $called = false;
1555
1556                 if ( $called ) {
1557                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1558                         return false;
1559                 }
1560
1561                 $called = true;
1562                 if ( $this->isFileCacheable() ) {
1563                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1564                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1565                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1566                                 $cache->loadFromFileCache( $this->getContext() );
1567                                 return true;
1568                         } else {
1569                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1570                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1571                         }
1572                 } else {
1573                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1574                 }
1575
1576                 return false;
1577         }
1578
1579         /**
1580          * Check if the page can be cached
1581          * @return bool
1582          */
1583         public function isFileCacheable() {
1584                 $cacheable = false;
1585
1586                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1587                         $cacheable = $this->mPage->getID()
1588                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1589                         // Extension may have reason to disable file caching on some pages.
1590                         if ( $cacheable ) {
1591                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1592                         }
1593                 }
1594
1595                 return $cacheable;
1596         }
1597
1598         /**#@-*/
1599
1600         /**
1601          * Lightweight method to get the parser output for a page, checking the parser cache
1602          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1603          * consider, so it's not appropriate to use there.
1604          *
1605          * @since 1.16 (r52326) for LiquidThreads
1606          *
1607          * @param $oldid mixed integer Revision ID or null
1608          * @param $user User The relevant user
1609          * @return ParserOutput or false if the given revsion ID is not found
1610          */
1611         public function getParserOutput( $oldid = null, User $user = null ) {
1612                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
1613                 $parserOptions = $this->mPage->makeParserOptions( $user );
1614
1615                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1616         }
1617
1618         /**
1619          * Get parser options suitable for rendering the primary article wikitext
1620          * @return ParserOptions
1621          */
1622         public function getParserOptions() {
1623                 if ( !$this->mParserOptions ) {
1624                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext()->getUser() );
1625                 }
1626                 // Clone to allow modifications of the return value without affecting cache
1627                 return clone $this->mParserOptions;
1628         }
1629
1630         /**
1631          * Sets the context this Article is executed in
1632          *
1633          * @param $context IContextSource
1634          * @since 1.18
1635          */
1636         public function setContext( $context ) {
1637                 $this->mContext = $context;
1638         }
1639
1640         /**
1641          * Gets the context this Article is executed in
1642          *
1643          * @return IContextSource
1644          * @since 1.18
1645          */
1646         public function getContext() {
1647                 if ( $this->mContext instanceof IContextSource ) {
1648                         return $this->mContext;
1649                 } else {
1650                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1651                         return RequestContext::getMain();
1652                 }
1653         }
1654
1655         /**
1656          * Info about this page
1657          * @deprecated since 1.19
1658          */
1659         public function info() {
1660                 wfDeprecated( __METHOD__, '1.19' );
1661                 Action::factory( 'info', $this )->show();
1662         }
1663
1664         /**
1665          * Mark this particular edit/page as patrolled
1666          * @deprecated since 1.18
1667          */
1668         public function markpatrolled() {
1669                 wfDeprecated( __METHOD__, '1.18' );
1670                 Action::factory( 'markpatrolled', $this )->show();
1671         }
1672
1673         /**
1674          * Handle action=purge
1675          * @deprecated since 1.19
1676          * @return Action|bool|null false if the action is disabled, null if it is not recognised
1677          */
1678         public function purge() {
1679                 return Action::factory( 'purge', $this )->show();
1680         }
1681
1682         /**
1683          * Handle action=revert
1684          * @deprecated since 1.19
1685          */
1686         public function revert() {
1687                 wfDeprecated( __METHOD__, '1.19' );
1688                 Action::factory( 'revert', $this )->show();
1689         }
1690
1691         /**
1692          * Handle action=rollback
1693          * @deprecated since 1.19
1694          */
1695         public function rollback() {
1696                 wfDeprecated( __METHOD__, '1.19' );
1697                 Action::factory( 'rollback', $this )->show();
1698         }
1699
1700         /**
1701          * User-interface handler for the "watch" action.
1702          * Requires Request to pass a token as of 1.18.
1703          * @deprecated since 1.18
1704          */
1705         public function watch() {
1706                 wfDeprecated( __METHOD__, '1.18' );
1707                 Action::factory( 'watch', $this )->show();
1708         }
1709
1710         /**
1711          * Add this page to the current user's watchlist
1712          *
1713          * This is safe to be called multiple times
1714          *
1715          * @return bool true on successful watch operation
1716          * @deprecated since 1.18
1717          */
1718         public function doWatch() {
1719                 wfDeprecated( __METHOD__, '1.18' );
1720                 return WatchAction::doWatch( $this->getTitle(), $this->getContext()->getUser() );
1721         }
1722
1723         /**
1724          * User interface handler for the "unwatch" action.
1725          * Requires Request to pass a token as of 1.18.
1726          * @deprecated since 1.18
1727          */
1728         public function unwatch() {
1729                 wfDeprecated( __METHOD__, '1.18' );
1730                 Action::factory( 'unwatch', $this )->show();
1731         }
1732
1733         /**
1734          * Stop watching a page
1735          * @return bool true on successful unwatch
1736          * @deprecated since 1.18
1737          */
1738         public function doUnwatch() {
1739                 wfDeprecated( __METHOD__, '1.18' );
1740                 return WatchAction::doUnwatch( $this->getTitle(), $this->getContext()->getUser() );
1741         }
1742
1743         /**
1744          * Output a redirect back to the article.
1745          * This is typically used after an edit.
1746          *
1747          * @deprecated in 1.18; call OutputPage::redirect() directly
1748          * @param $noRedir Boolean: add redirect=no
1749          * @param $sectionAnchor String: section to redirect to, including "#"
1750          * @param $extraQuery String: extra query params
1751          */
1752         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1753                 wfDeprecated( __METHOD__, '1.18' );
1754                 if ( $noRedir ) {
1755                         $query = 'redirect=no';
1756                         if ( $extraQuery )
1757                                 $query .= "&$extraQuery";
1758                 } else {
1759                         $query = $extraQuery;
1760                 }
1761
1762                 $this->getContext()->getOutput()->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1763         }
1764
1765         /**
1766          * Use PHP's magic __get handler to handle accessing of
1767          * raw WikiPage fields for backwards compatibility.
1768          *
1769          * @param $fname String Field name
1770          */
1771         public function __get( $fname ) {
1772                 if ( property_exists( $this->mPage, $fname ) ) {
1773                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1774                         return $this->mPage->$fname;
1775                 }
1776                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1777         }
1778
1779         /**
1780          * Use PHP's magic __set handler to handle setting of
1781          * raw WikiPage fields for backwards compatibility.
1782          *
1783          * @param $fname String Field name
1784          * @param $fvalue mixed New value
1785          */
1786         public function __set( $fname, $fvalue ) {
1787                 if ( property_exists( $this->mPage, $fname ) ) {
1788                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1789                         $this->mPage->$fname = $fvalue;
1790                 // Note: extensions may want to toss on new fields
1791                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1792                         $this->mPage->$fname = $fvalue;
1793                 } else {
1794                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1795                 }
1796         }
1797
1798         /**
1799          * Use PHP's magic __call handler to transform instance calls to
1800          * WikiPage functions for backwards compatibility.
1801          *
1802          * @param $fname String Name of called method
1803          * @param $args Array Arguments to the method
1804          * @return mixed
1805          */
1806         public function __call( $fname, $args ) {
1807                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1808                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1809                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1810                 }
1811                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1812         }
1813
1814         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1815
1816         /**
1817          * @param $limit array
1818          * @param $expiry array
1819          * @param $cascade bool
1820          * @param $reason string
1821          * @param $user User
1822          * @return Status
1823          */
1824         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1825                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
1826         }
1827
1828         /**
1829          * @param $limit array
1830          * @param $reason string
1831          * @param $cascade int
1832          * @param $expiry array
1833          * @return bool
1834          */
1835         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1836                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1837         }
1838
1839         /**
1840          * @param $reason string
1841          * @param $suppress bool
1842          * @param $id int
1843          * @param $commit bool
1844          * @param $error string
1845          * @return bool
1846          */
1847         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1848                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1849         }
1850
1851         /**
1852          * @param $fromP
1853          * @param $summary
1854          * @param $token
1855          * @param $bot
1856          * @param $resultDetails
1857          * @param $user User
1858          * @return array
1859          */
1860         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
1861                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
1862                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
1863         }
1864
1865         /**
1866          * @param $fromP
1867          * @param $summary
1868          * @param $bot
1869          * @param $resultDetails
1870          * @param $guser User
1871          * @return array
1872          */
1873         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
1874                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
1875                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
1876         }
1877
1878         /**
1879          * @param $hasHistory bool
1880          * @return mixed
1881          */
1882         public function generateReason( &$hasHistory ) {
1883                 return $this->mPage->getAutoDeleteReason( $hasHistory );
1884         }
1885
1886         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
1887
1888         /**
1889          * @return array
1890          */
1891         public static function selectFields() {
1892                 return WikiPage::selectFields();
1893         }
1894
1895         /**
1896          * @param $title Title
1897          */
1898         public static function onArticleCreate( $title ) {
1899                 WikiPage::onArticleCreate( $title );
1900         }
1901
1902         /**
1903          * @param $title Title
1904          */
1905         public static function onArticleDelete( $title ) {
1906                 WikiPage::onArticleDelete( $title );
1907         }
1908
1909         /**
1910          * @param $title Title
1911          */
1912         public static function onArticleEdit( $title ) {
1913                 WikiPage::onArticleEdit( $title );
1914         }
1915
1916         /**
1917          * @param $oldtext
1918          * @param $newtext
1919          * @param $flags
1920          * @return string
1921          */
1922         public static function getAutosummary( $oldtext, $newtext, $flags ) {
1923                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
1924         }
1925         // ******
1926 }